Carton opener



S. H. BERCH v CARTON OPENER Jan. 18; 1949.

4 Sheets-Sheet 1 Filed Feb. 7, 1947 i INVENTOR.

demon H 5566/1 BY I Z Jan. 18, 1949.

s. H.' BERCH' CARTON- OPENER 4 Sheets-Sheet 2 Filed Feb. 7, 1947 'INVENTOR. Same/:4 Hf 55605 5. H. BERCH CARTON OPENER Jan. 18, 1949.

4 Sheets-Sheet 3 Filed F b. '7, 1947 INVENTOR. SHMUEL HEEEC S. H- BERCH CARTON OPENER Jan. 18, 1949.

' 4 Sheets-Sheet 4 Filed Feb. '7, 1947 INVENTOR. 5/9/7054 H 5520.

Patented Jan. 18, 1949 Samuel H. B'erch, Beverly Hills, Galii, assignor to ArdenFarms-Cm, Los Angeles, Caliit, a corporation of Delaware Application February 7, 1947', Serial'No. 72.7366

This invention relates to a" dispensing device, and particularly pertains to a carton opener.

In merchandising products, and especially in merchandising ice cream, 'fcldable cartons have been provided intowh-ich the ice cream is placed asemi -plastio state to fill the carton, and after which the carton with its product is "refrigerated to solidify the ice creamfor' merchandising purposes. carton particularly adapted to this purpose is shown in a co-pending' application filed by Samuel H. Berch on Qctobr 31, 1944, entitled Carton for ice cream and the like, and bearing Serial No. 56-13235, now Patent No. 2,443,530, granted June I I948; A machine for forming the cartons, filling them, andcl'osing them, has been shown in an application filed by Samuel H. Berch on November 28, 1945-, entitled Packaging machine for icecream and' the like, bear ing Serial No. 631,331. These cartons and the machine were designed to be used in a sales campaign whereby relatively small'quantities' of ice cream could be merchandised for home consumption or. for use in soda fountains and restaurants, the idea being that the quantity of ice cream would represent one hel'ping,- which couldbe' served individually or placed in ice cream sodas, malted milks, and'the like. The particular carton is designed so that when its sealing fiap is i opened it is possible for the front-side wall of the carton to be grasped while the sealing flap is grasped to permit the side gusset's on the carton to unfold and completely'uncover'the"frozen cube of ice cream as the cover flap and the front wall are pulled in opposite" directions from each other.

This operation takes place satisfactorily" under" normal conditions of storage refrigeration; However, in the freezing cabinets used byi'soda fountains and restaurants the products are maintained at such a low temperature that the side walls of the carton adhere firmly to the mass'of frozen product. It is desirable, therefore, to provide a simple and convenient machine for mechanically opening said cartonsso that the cube of frozen product may be dropped onto a plate or into a glass. It is the principal object of the present invention, therefore, to provide a relatively small device into which individual filled cartons of the foldable type may be placed, and which machine will act automatically to" open the carton and to forcibly separate the carton walls" from the mass of frozen product without wasting theproduct.

The present invention contemplates th 'e provision of a base structure carrying; receiving means into which a foldedcarton may be placed, said receiving means engaging certain sides of the 11 Claims. (or. 93. 2)

carton, after which mechanically driven and operated fingers engageother portions of the carton to cooperate with the receiving means in pulling the side walls of thecarton away from the sides of the mass of frozen materialto whichthey have adhered.

The invention is illustrated by way'of example in the accompanyingdrawings in which:

Figure I is a view in end elevation'showing the carton opening machine with which the present inventionis concerned.

Fig. 2 isa view in side.- elevation showing the carton opening machine:

Fig; 3*is a vi'ewin verti'cal'secti'on through the carton opening machine as: seen on'the line 3 3 of Fig. 2.

Fig. 4' is a View in vertical section through the carton opening machine as-seen on the linev 4-6 of Fig. I.

Fig. 5. is an. enlarged: fragmentary view in vertical' section as: seen on. the line 5-5 of Fig. 1'

and shows a carton position. therein.

Fig. 6 is an enlarged fragmentary View in vertical section showing the carton. receiving means i as seen 011* the line 6--6 of Fig. 5. Y

Fig; 7 isan enlarged fragmentary view in elevationv showing the: carton an. initial position 8- is an. enlarged fragmentary view of the. carton receiving means as seen. at right angles tothe' view shown Fig. '1.

Fig. 9 is a view showing the structure indicated in. Fig. 8 with the carton.- partially unfolded.

Fig. 10 is a View end. elevation as seen on the line l0.l0. of Fig. 9: and shows the initial spreading position of the spreading fingers.

Fig. l]. is a fragmentary view in elevation show-- ing. the parts indicated in Fig. 10 and disclosin the spreading fingers in their final position.

Fig. l2 is. a fragmentary view in elevationtaken at right angles to the View shown in Fig. 11 and indicates. the carton. in its final spreaded position and the. product. ready to be discharged.

Fig. 131s. an enlarged transverse View in horizontal section. showing the mounting of thespreading fingers. as seen onthe line l3.l3-- of Fig. 3.

Fig. 14 is an enlarged fragmentary View in section as seen on the line M-M of Fig. 13 and.

shows the rack and pinion structure for operating the spreading. fingers.

Referring more particularly to the drawings,

35. indicates a base structure here shown as being.

box-like and having a bottomwall [6, side walls- I land It and end. walls l9 and.- 20. Mounted structure across the top of these walls is a top plate 2|. Disposed at opposite edges of the top plate 2| and substantially midway the length thereof are a pair of vertical standards 22. These standards are spaced a distance apart substantially equal to the width of the base and carry a pair of spreading fingers 23 which aremounted onhorizontal pivot pins 24.- As shown in Fig. '13 the,

mounted upon a bearing 29 and pivoted thereto by a pivot pin 38. At a point intermediate the ends of each of the levers 28 the lower ends of complementary gear racks 25 are pivotally connected thereto by pins 3|. Each of the lever arms 28 carries a cam roller 32, here shown as being disposed between the endof thelever and the pivot pin 3|. The levers-28 swing vertically and the cam rollers-32 carried thereon extend into eccentric cam grooves 33. Thehcam grooves; 33 I i are formed in the inner faces of cam discs 34. The-cam discs are mounted upon a shaft 35 which is supported to rotate on a horizontal axis of the side walls l1 and I8 of the housing structure. Mounted on one end of the shaft 35 is a gear 36 which is fixed thereto and is in mesh with the pinion 31, The pinion 31 is mounted on-a shaft 38 which extends through the side wall ll of the housing. On the outer end of the shaft 38 is an operating crank 39 which may be rotated to drive the shaft 35. A stop pin 48 .extends inwardly from one face of the gear 36 and may encounter a lug 4| carried by a spring'finger 42. A plunger rod 43 is mounted to reciprocate through anopening in the wall and engages the spring finger 42. The outer end of the rod 43 is fitted with a knob 44 so that the rod 43 may be forced inwardly and will move the lug 4| out of the path of travel of the stop pin 48 to'permit further rotation of the gear 36. I

Mounted upon the cover portion 2| of the housing is an upper extension of-the housing, as indicated at 45. This upper extension is positioned along the longitudinal center line between the standards 22. This extension is formed with opposite side walls 46and 41 which are equally spaced from the longitudinal center midway between the standards and a pair of side walls 48 and 49 which are spaced from eachother and are disposed at one side of the vertical plane of the standards 22, as shown in Figs. 3 and 4. The supporting structure is fitted with a horizontally disposed cover 58, upon which a carton, generally indicated at 5|, may rest during the various operations to be performed, as hereinafter described. Extending upwardly from opposite sides of the supporting structure and normally in'alignment with Walls 4 8 and 49' are movable guides 52 and 53. These guides, are pivoted near their lower ends upon pins 54 and 55 which are carried by the side walls 46 and 41 of the support 45. Formed'at the lower ends of the guides 42 and 43 areextensions '58 and "51, respectively. These extensions carry pivot. pins 58- and 59 which extend through slotted openings 60 and 6| of operating levers 62 and 63. The lever 62 has a vertical portion extending downwardly and parallel to the side wall 49. These levers extend through an opening 64 in the cover 2| of the housing, At a point beneath the opening 64 the lever 62 is bent and extends to a mounting bracket65 carried by the housing wall 20 and pivoted tothe arm by a pin 66. Thelever arm 63 has a vertical portion extending downwardly parallel to the wall 48 to a point below the opening 64 where it is bent to extend oppositely from the bend of lever 62 and is mounted upon a block 61 by a pivot pin 68. At a point approximately at the bend of the lever 62 a link 69 is connected by a pin 10. The opposite end of the link extends downwardly at an angle to the vertical and is pivoted to a lift lever H by a pin 12. At the bend of the lever 83 a link 13 is pivotally connected by a pin 14. This link extends downwardly and outwardlyin an opposite direction from that of the link 69 and is connected to the end of a lever 15 by a pivot pin 16. The levers H and 15 are mounted upon horizontal pivot pins- 1! carried by brackets 18. The brackets are mounted upon the housing wall l'9. Thus, due to this arrangement the lift levers II and 15 may swing vertically and will in turn cause the levers 62 and 63 to swing toward and away from each other.

ards 22. Extending into these cam grooves are rollers which are pivotally mounted upon the levers II and I5 and will thus cause the levers to oscillate vertically as controlled by the cams.

This oscillation will cause the guides 52 and 53 to swing upon their horizontal axes, as will be hereinafter described. v

The guide member 52 extends above the plate 50 a distance greater than the height of the carton 5|, as shown in Fig. 5 of the drawings. At the opposite vertical edges of the guide member 52 are vertical flanges 8| which are spaced a distance apart slightly, greater than the width of the carton 5| so that the carton may slide down between them. Extending outwardly at the op-;

posite outer sides of the flange 8| are wings82. These wings are substantially triangular in shape and act as confining guides for the sides of the package as the package is unfolded. Formed on the inner face of the guide member 52 at a height above the horizontal plane of the top of the package 5| is a pair of lugs 83. These lugs have square horizontal faces 84 which are presented downwardly and are disposed adjacent to the inner horizontally through the upper ends of the arms and through the flanges 8| and allow the frame member 85 to swing horizontally from a position indicated in Fig. 2 of the drawings to a vertical.

position as shown in Fig. 5. Spring blades 81 are secured to the frame members 85 and tend tourge the lower ends of the frame members 85 to their outermost positions.

Carried upon the frame members and projecting upwardly to a point above their axes are blades 88. These blades terminate in an in-turned point 89 whichwill force its way through the wallof the package preparatory to a spreading operation.

Mounted upon the shaft 35 is a pair of;v cams 19 having eccentric cam grooves intheir. opposing faces. These cams are spaced a disatance from each other onthe opposite side of the: median plane of the machine between the stand avg-mamas:

7 ing carfi'sliave, a pointed H tjea at IIII ahdian arcuate '"tion m2: The i'nhi f faeedrftiie'carn is" co'iive e511 as ifidicate'd' at m3 and" the faces Hi2 ahif I113 diverge fro'n'iieacli othertoward the 10w- 7 cf efidjof the s'triictil're toproducefasubstantitilftfi'alngiild? cross-s ction. At theflo'w'er or base iportion'of the spreading cam is an inner lug it iaise dates ts I'IIE with intermediate arcuate length III'B, which lengthisfconcentric with the pivot of the cam. Acting against the mg. to it inwardly a leaf spring IO'I- is prdvided. This'spring is fixed at thev bottom of the t roat of the member 98. By reference to F1 5 ft will-:be' seen te t the pointed ends I-IJI of the spreading'cams- 91 are triangular in shape andyare oi; greater; width than the portion which extends downwardly in the fork of the members a i vAt; thelower ends if; he: unfold-ing fingers; 9 6 v are extensions Ill-8.: il-he extensions illll project belowthe point. of the-pivot M11895 and-carry pigis flflwhich: are parallel to the pivot pins 85. i The pins I69 extend through slotted openings IEO im-the upper ends of actuating levers III.

These: levers extend downwardlythrough the opening.- Qlin; the cover 2I- of the housing-and each-other to extend to bearing". brackets.- II;2.;-," I-he brackets I-I-2- are. mounted upon theinner-faces of the-housingwalls I1 and I8. Pivot pins I I3. connect the actuating levers with the brackets. Adjacent to the point at which the actuating leyers l II cross each other each of the levers is' fitted with a pivot pin II 4 whichspa sses through a link I I5,- it bein-gunderstood-that theic are two linlts one associated with eachot the, levers. if}, These links eiitend downwardly and arevbdth pivotally mounted upon a cylindrical eigtension hi5" formed at the end fa lever/H6.

The ley'er !Ilj extends horizontally and is pivotally mounted upon the; horizontal pivotal shaft ll caiiriedby the brlacliets 18. A tension spring II! esteemed to bothofthe actuating levers III as {Slahebhtth the level- H6. and thus tndsto iorcfe the uppei ends. of the actuatine yel .Il .la liiis -I i lif; l' l i 1.31? lever H6 atev' and in vertical alignment with the axis oi shaft-35 isr a cam roller II 8* which "rests upon the pei imeter of 'acam' I F9; The cam- H SIis fixed. upon: the shaft' 35' and" is; disposed with a swell. portion diametrically opposite to't'heswell 'oftlie" 4 carii'groov' 33 in tl'ie cam: 34;

In operation of the? presentinvention, the structure is assembled-as shown in Figs. 1 and'2 and'isIe'ablY'to-re'ceive' acarton 5.5". The carton 5I- as disclosed in" the above-mentioned co-pendor" light-weight cardboard. The blank of thec'arton issubst'a'ritially square and its sides represent threetiines the width of the'final carton wall and' three-titties the height of the final carton. The

corner fieldsare scored diagonally so that two triangular'fielclswill occur and will fold over upon themselves t'oioim'guss'ets and then will fold over opposite sides of the carton. The square fields which represent the opposite side walls, of the -"-carton fro'm those upon which the gussets are foldedf are' formed at their upper edges with a square'in'ne'r" cover field and an overlapping cover field; last named field has side tangs clesign'ed to extend downwardly into the pockets formed by the outermost opposite gussets. The bottom of the" carton formed as previously described is indicated at lZO; while opposite side walls covered by the folded'gussets are indicated 1 at IZI' The inner a'nd'outer' gussets are indicated at', l22 and I23, respectively. The top cover is indicated at I24 and the side tangs which extend into the outer gussets I23 are indicated at I25. The si'de wall to which the top cover 523 is hinged is indicated at I26, and the opposite side wall is indicated at I'2I. This side wall carries the inner cev-eriinember I28.

Care must be taken to insert the package into position between the guide members 52 and 53 so that-the side Wall I26 is adjacent to the guide member 52 and theside wall I2!- is adjacent to the guide member 53. This will place the side walls I2I with their gussets in a position to be engaged by the spreading'cams 9?. As the carton is moved downwardly in the direction of the arrow c, as indicated in Figs. 1 and 2, its side walls I25 and I21 willbe parallel to the normally vertical inner faces of the guide members E52 and 53-,"and; the walls I2I with their gussets will fit between andbe parallel to the vertical flanges fil carried by the guide members 52 and 53.

the carton moves downwardly it will be forced between the lugs 83 formed upon the guide mem hers 52 and 53'. This will tend to swing the guide members 52 and 53 outwardly and oppositely around their pivots. As this takes place the blade members 88 will be disposed with their in tnrnedpoints presented toward the side walls 526 and I21, and as the carton continues to move downwardly until it rests upon the supporting carton Wall and between it and the cube of ice cream contained by the carton. At the same time the filled carton is moving to the position shown in Figs. 5 and 6 of the drawings its side.

walls will be moving downwardly with relation tothe pointed ends IIlI of the spreading cams 9i] When the triangular point I Ill of the spreading pplicatibii', is made'fr-orn' one sheet of paper cams reaches the intersection'of the folded linesof the gussets I22 and I23 the point will be forced beneath them and upwardly to the position shown in Fig. 6 of the drawings. I

The machine is now ready to be operated. This is done by rotating the crank 39 inthedirection of the arrow 1), as indicated in Fig. 2. This will rotate the gear pinion 31 in the direction of the arrow c, as indicated in Fig. 4, and will rotate the gear 36 in the direction of the arrow 11, as shown in Fig. 4. The shaft 35 will also rotate in the direction of the arrow d and at this time the cam II9 will act to lift the cam roller I I-8 and to swing the lever IIii upwardly. When this takes place the links IE5 which are connected to the actuating levers III will cause: the levers III to swing outwardly and oppositely in the direction of the arrows e, as indicated in Fig. 3 of the drawings. This at the same time will swing the unfolding fingers 95 outwardly and downwardly, as indicated by the arrows f in Fig. 3 of the drawings. As these fingers swing outwardlyand downwardly they will forcefully pull the folded gussets H2 and I23 outwardly, and at the same time will 'pull away from the cover tangs I25 so that these tangs will become disengaged. The position of the gussets after being separated are as indicated in Figs. '7 and 8 of the drawings. It willbe seen in Fig. 8 that the gussets I23 have pulled away from the tangs I25 andthis has allowed the outer cover member I23 to swing upwardly to a partially open position. The inner cover member I28 will at this time be engaged by the overhanging hook 92 of the catch plate'QIl so that the product within the carton will be temporarily maintained in a covered condition. It will be noted that during the movement of the lever II6 the unfolding fingers 95 will be swung tofa'hori zontal position, as shown in Fig. '7 of the drawings. As the fingers 96 move to their horizontal supporting structure 45, asshown in Figs-.2 and 9,--it will be evident that the fingers 23 will not: not strike theblock ofmaterialwhich has vbeen I -sealed.within the package, and which material :is indicated by the numeral-I33; -By reference,

to Fig. 9 it will be seen that when-the guide member 52 has been-moved to its horizontal position, the blades 88 which penetrated the side wall I25; of the-ca'rton-will have-pulled thiswallof thei carton downwardly and will have unfoldedthe gusset I22. The fingers engage the gusset portionsand as the folding fingers 23 swing down-:

wardly and outwardly they will tend to pull the side walls I2 I away. from theblock o1 productlu;

so that when the guide member 53 swings down-' ,.be understood-that the spreading fingers 23 were,

movedto their. lowermost positions by the upward 40 position and after they have disengaged the gussets from the cover tangs I25 thelever arms 'H and 15 will operate. This isjaccomplished by the action of cams I9 in engagement with rollers 83 carried b the lever arms TI andl5. This action will cause the guide plates 52 and 53 to swing outwardly in sequence. First, the-guide plate '52 will swing outwardly and downwardly in the direction of the arrow g, as indicated ihFig. 9, and then the guide plate 53 will swing outwardly and downwardly in the direction of the arrow h, as indicated in Fig. 9. This sequence of operation is due to the arrangement of the'Iinkage between the levers ii and I5 and the levers 62 and 63, as well as a diiierence in the lengths of the levers and their mountings.

As the guide members 52 and 53 successively swing to their horizontal positions the'spreading fingers 23 will swing downwardly to engage the side walls I2I away from which the gussets I22 and I23 have been spread. The spreading fingers 23 are substantially hook-shaped. They have a relatively long arm portion I30 which con tinues in a portion I3I bent at slightly'greater than ninety degrees to the member I30. This portion terminates in a turned finger I32 which' bears an angular relation to the members to insure that at the end of the swinging movement of the spreading fingers 23 the outer face-of the portions I32 will lie fiat against the sides'of the carton and will hold these sides fiat against the flat surfaces of the Wings 82 carried by the guide members 52 and 53, as shown in Fig. 11.

In view of the fact that the position of the spreading fingers 23 is offset from the side of the movement of the gear racks 25as efiected by the cams and while rotating the pinions 26 W1'ien the operating cranl 39 hasfmoved through'a cycle to place the parts in the position shown in Fig. 12of;the drawing the stop pin' III will haveen countered. the lug M on the springmember 42. The knob 44 may then be pressed'to move the lug III clear of thestop pin 40 so that :urther rotation 'of the structure in the same direction wilirestore all of the parts to theiroriginal normaLpositio'ns as illustrated'in Figs. land 2"oi' the drawings. e machine then ready 'Ior another operation. It will thus befseen that the carton opening device here disclosed is small and compact and designed so that it maybe used convenientlyj' without'occupying any considerableamount of counter space, and thatthepackage may be easily .placed within-thedevice and the product may be quickly unwrapped me full mechanical auto matic operation. While I have shown the preferred form o! my invention as now known to me, it will be understood that various changes may be made m com 1 bination, construction and arrangement of parts by those skilled in the art, without departing from the'spirit of the invention as claimed.

Having thus described my invention, what I claim and desire to secure by Letters Patent isz 11 A carton opening machine-for use in' 'unwrapping cartons filled with a product, and which carton "is made from a one-piece blank folded to form a six-sided package having overlapping gu'ssets on two opposing sides and a cover mem j ber formed with a tang introduced into certain of said gussetsto hold the ackage sealed; said machine comprising a supporting plateupon which the sealed carton may be placed, a pair' of guide members at opposite sides thereoi' between which the carton is moved onto said'plate,' means"associated with said guide members' fcrengaging contiguous side walls of the carton positively, a pair of unfolding fingers disposed adjacent to the two remaining oppositeedges of n the platform, means carried at the ends thereof to pass into. the folds beneath .the gussets, a support for said supporting plate, individual pivotal connections between each of'the guide members and unfolding fingers and said support;

rearm walls defining a square opening, a complementary opening through the top of said housing and around which said side walls are arranged, a horizontally disposed supporting plate at the top of said supporting structure, said plate substantially agreeing in configuration and dimensions with the bottom of the carton which is adapted to rest thereupon, a pair of unfolding fingers pivotally mounted at their lower ends upon said supporting structure and disposed at opposite edges of the supporting plate, the upper ends of said unfolding fingers being free and acting to slip between the contiguous side walls of the package and the gussets folded thereover, a pair of guide members, one pivotally mounted to each of the remaining sides of the supporting structure, positive carton engaging means carried thereby for puncturing contiguous side walls of the carton to hold said walls to swing with said guide members, a cam shaft rotatably mounted within said housing, means for rotating the same, a pair. of actuating levers mounted within the housing and connected with the unfolding fingers, unfolding finger cams on the cam shaft, cam rollers and linkage associated therewith and connected to the actuating levers to draw the same toward each other and swing the unfolding fingers outwardly, guide member cams on the cam shaft, cam rollers and linkage associated therewith for actuating said guide fingers as the cams rotate, said unfolding finger cams and guide member cams acting in sequence to first unfoldthe guse sets upon opposite sides of the carton, and then to swing the two remaining sides of the carton outwardly and downwardly away from the product. 1

8. The structure of claim 7 including spreading fingers mounted on the housing and adapted to swing downwardly into engagement with the gusset portions of the carton blank to move them outwardly and to separate the remaining side walls of the carton from the packaged product, and means associated with said cam shaft for actuating said spreading fingers.

9. The structure of claim '7 including spreading fingers mounted on the housing and adapted to swing downwardly into engagement with the gusset portions of the carton blank to move them outwardly and to separate the remaining side walls of the carton from the packaged product, means associated with said cam shaftfor actuating said spreading fingers, stop means for interrupting rotation of said cam shaft when the spreading finger operation has been completed, and a release therefor to permit the camshaft to continue its rotation while restoring the parts of the machine to their original positions.

- 10.- In,-;a carton opening machine for use iii unwrapping. cartons filled with a product, and which carton is made from a one-piece blank folded to form a six sided package having overlapping gussets on two opposing sides and a cover member formed with a tang introduced into certain of said gussets to hold the package sealed; a structure for unfolding the gussets at the sides of the I carton and separating the cover tangs therefrom, which comprises a supporting plate upon which the carton is placed, an unfolding finger positioned along one edge of said plate and extending vertically, a pivotal mounting for the lower end ofsaid finger at a point beneath the plate whereby the finger may swing from a vertical to a horizontal position, a spreading cam pivotallymounted on the free end of said spreading fingerand adapted to enter between the folded gussets and the wall of the container over which they arefolded, a lug formed as a, part of said cam and engaged by the wall of the container and acting to urge the point of the cam inwardly against the containerwall, means yieldably holding the lug in its innermost position, and mechan; ieal means'for swinging the finger outwardly and downwardly upon its pivotal axis to unfold the gussets and disassociate them from the tang of the carton cover. v i

ll. Ina carton opening machinefor use in unwrappingcartons filled with a'product, and which carton is made from a one-piece blank folded to form a six-sided package having overlappinggussetson two opposing sides and a cover member. formed with a tang introduced into certain of said gussets to hold the package sealed; a supporting plate onto which, said carton is dis posed, aguiden'iember positioned along one side thereof and pivotally mounted to swing outwardly froinla normal vertical position to a horizontal position and downwardly along which said carton moves onto said supporting plate, a, frame member on the ,inner face of said guide member and pivoted a" its upper edge whereby its free edge may swing outwardly, means urging said free edge outwardly toward a contiguous wall of said carton, blade carriedby the free edge of said frame member and extending upwardly parallel thereto, the up'per end of said blade terminating in an in-turned point adapted to penetrate the wall of the carton with which it contacts, and mechanical means for swingingsaid guide member, the blade, and the side walls of the carton engaged thereby outwardly and downwardly into substantially the plane of the bottom wall of the carton.

' SAMUEL H. BERCH.

No references cited. 

